Tim X biet: X x 7+6=Xx8
Tim x,biet
a; xx2+xx8=960
b; xx13-xx4=612
\(a,x\times2+x\times8=960\)
\(x\times\left(2+8\right)=960\)
\(x\times10=960\)
\(x=960:10\)
\(x=96\)
\(b,x\times13-x\times4=612\)
\(x\times\left(13-4\right)=612\)
\(x\times9=612\)
\(x=612:9\)
\(x=68\)
Tim X biet X=6/5*7/6*8/7*....*2015/2014 ?
tim x biet 1 / 3 x 4 + 1 / 4 x 5 + 1 / 5 x 6 + 1 / 6 x 7 = 1 / x
Gia tri cua x biet;
Xx4+Xx6+Xx8=2016
\(x\times4+x\times6+x\times8=2016\)
\(x\times\left(4+6+8\right)=2016\)
\(x\times18=2016\)
\(x=2016:18\)
ủng hộ nha
\(x=112\)
X x 4 + X x 6 + X x 8 = 2016
X x (4+6+8)=2016
X x 18 = 2016
x =112
tim x biet :
-x-2/3=-6/7
4/7-x=1/3
-x-2/3=-6/7
=>-x=-6/7+(-2/3)
=>-x=-32/21
=>x=32/21
4/7-x=1/3
=>x=4/7-1/3
=>x=5/21
-x-2/3=-6/7
=>-x=-6/7+(-2/3)
=>-x=-32/21
=>x=32/21
4/7-x=1/3
=>x=4/7-1/3
=>x=5/21
Tim gia tri cua x biet
(x-5)*(x-7)*6
Tim x biet : ( x + 1 ) + ( x + 2 ) ( x + 3 ) + ( x +4 ) + ( x + 5 ) = 4 + 5 + 6 + 7 + 8
Ta có : ( x+1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) + ( x + 5 ) = 30
( x + x + x +x +x ) + ( 1 + 2 + 3 + 4 + 5 ) = 30
x * 5 + 15 = 30
x * 5 = 30 - 15
x * 5 = 15
x = 15 : 5
x = 3
Vậy x = 3
Duyệt đi , chúc bạn học giỏi
(x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) = 4 + 5 + 6 + 7 + 8
x + 1 + x + 2 + x + 3 + x + 4 + x + 5 = 30
\(x\)x 5 + 15 = 30
\(x\)x 5 = 30 - 15 = 15
x = 15 : 5 = 3
Tim x biet
x-(-25-17-2x)=6+x
45-/-27-(-25)-x/=7+27
Tim x ,biet:
4/7:x+5/6=0,5
\(\frac{4}{7}:x=0,5-\frac{5}{6}=\frac{1}{2}-\frac{5}{6}=\frac{-1}{3}\)
\(x=\frac{4}{7}:\frac{-1}{3}=\frac{-12}{7}\)
4/7 : x + 5/6 = 0,5
4/7 : x + 5/6 = 1/2
4/7 : x = 1/2 - 5/6
4/7 : x = 3/6 : 5/6
4/7 : x = 3/6 . 6/5
4/7 : x = 3/5
x = 4/7 : 3/5
x = 4/7 . 5/3
x = 20/21
Vậy....
@Cothanhkhe
\(\frac{4}{7}:x+\frac{5}{6}=0,5\)
\(\frac{4}{7}:x+\frac{5}{6}=\frac{1}{2}\)
\(\frac{4}{7}:x=\frac{1}{2}-\frac{5}{6}=\frac{3}{6}-\frac{5}{6}\)
\(\frac{4}{7}:x=\frac{-1}{3}\)
\(x=\frac{4}{7}:\frac{-1}{3}\)
\(x=\frac{4}{7}.\frac{-3}{1}\)
\(x=\frac{-12}{7}\)